Louis J. Marett

Louis Marett helps private equity funds and their portfolio companies to minimize their tax burdens in connection with mergers and acquisitions and fund formations. Known for meticulous preparation and devising creative approaches to structuring and closing deals, he has advised clients on hundreds of major transactions. 

Louis’ clients include many private equity funds, such as BV, Candescent, Century, Columbia Capital, Cove Hill, Ecosystems, Essex-Woodlands, Falcon, Great Hill, HarbourVest, M/C Partners, New Heritage, Riverside, Serent Capital, Silversmith, Spectrum, Summit, Surveyor, Sverica, Symmetric, Tower Arch, Turn/River, Windjammer, and XPV.


  • Massachusetts Super Lawyers
  • Best Lawyers in America (2003-2024)
  • The Legal 500 (2013-2024)

  • Chambers USA (2004-2024)

  • Business Today “Top 10 Massachusetts Tax Lawyers Influencing 2023’s Business Landscape Explained”

Representative Engagements

  • Advised Serent Capital in the sale of its portfolio company Pondera Solutions to Thomson Reuters.
  • Represented Spectrum Equity in the sale of portfolio company Verafin Holdings, Inc. to NASDAQ.
  • Advised Sverica Capital Partners in its platform acquisition of Cytracom, LLC.
  • Advised Riverside Partners in its sale of Allied Dental Holdings, LLC.
  • Represented Tetragon Financial Management, a London-based hedge fund, as it became the largest institutional investor in Ripple, an internationally-known cryptocurrency company.
  • Hundreds of other corporate and partnership transactions over 45 years of practice.

Publications and Presentations

“Transactional and Operational Challenges and Strategies for International Growth,” panelist, Thriving in a Global Economy.

Professional and Community Involvement

  • Trustee of the Massachusetts Eye and Ear Infirmary
  • Trustee of the St. Vincent de Paul Foundation
  • Past trustee of the Massachusetts Taxpayers Foundation
  • Past trustee of the Schepens Eye Research Institute

Education & Credentials

Harvard Law School
JD, 1972, cum laude
Harvard College
AB, 1968, magna cum laude



U.S. District Court, Massachusetts

U.S. Tax Court

U.S. Court of Federal Claims

Louis's Insights